Mandrel press



T. W. BURT MANDREL PRESS Dec; 30,` H924.

Filed May 25, 1922 Patented Dec. 3U, 1924.

UNITED STATES PATENT OFFICE. l

TOWNSEND W. BURT, OF HEMPSTEAD, NEW YORK.

MANDREL PRESS.

Application filed May 25,

n ments in Mandrel Presses, of which the following is a specification.

This invention relates to machines for removing gears, wheels and thelike from their shafts, or for mounting` the same on their shafts.

One of the objects of this invention is to devise a machine which may beused for either of the above named purposes with a minimum amount ofchanging.

A further object of the invention is to construct a. mandrel press whichis more simple and quicker to operate than the presses at present in useand at the same time of less cost.

Referring to the drawings in which what I now consider' the preferredform of my invention is shown;

Fig. 1 is a front elevation, partly in section of my preferred form ofpress.

Fig. 2 is a side elevation of the same. Fig. 3 1s a section on line 3-3looking down with the work removed.

Fig. 4 is a detail showing the attachment for employing` the machine toplace a gear upon a shaft.

Fig. 5 is a front elevation of a modified 1 form of removable foot rest.

My apparatus is shown as made up of a base 1 on which is hinged a handoperated lever 2 which may be forkedat the base so as to have two spacedears 3 and 4, through which extend bolts 5 and 6 secured between pairsof upstanding ears 7 and 8-on the base. An open frame 9 is shown ashinged at 10 and 11 on said lever 2 at points comparatively close to thepivotal points of lever 2 so that a large leverage will be exerted tomove saidframe 9 downwardly on rotation of the lever 2 in a clock-wisedirection in Fig. 2. The frame 9 is shown as passing upwardly on eachside of the work-holder or table 12. Said table is held in spacedrelation to the base 1 as by means of a tube or hollow column 13. rfheworkholder at opposite sides thereof may be cut away to form oppositeshoulders 15 and 16 to limit the angular movement of the frame 9 aboutpivots 10 and 11. If desired, an adjustable threaded stop 17 may be pro-1922. Serial No. 563,610.

vided on one of the shoulders so that it may be positioned accurately tomaintain the frame when in its forward position exact-ly vertical, i.e., directly over the work. The frame 9 is shown as extending above thework-holder 12 and provided adjacent its upper end with crosspiece 18.Said piece may be adjustably mounted in the frame 9 as by means of setscrews or bolts 19 which may be inserted in any one of the plurality ofholes 2O and '21 in the oppositel legs of the frame. Movably mounted insaid cross piece 18 is the work engaging member 22. Said member may haveany suitable adjustable mounting in the frame 18 but is shown asprovided with ratchet teeth 23 with which a double acting pawl 24cooperates. Said pawl is shown as pivoted to member 18 at 25 and isbiased so that either| its lower tooth 26 yieldingly engages the ratchetas shown in Fig. 1 or its upper tooth 27 engages said ratchet by meansof the spring 28 and link 29 which is pivotally and slidably mounted onpin 29. lVhen in the position shown in the drawings, it is obvious thatthe pawl will permit ready downward movement of the ratchet bar 22 toengage the work, but will prevent upward movement thereof. If on theother hand the pawl is tripped by the thumb-piece 30, the reverse istrue. The work is shown in this instance as a gear 31 from which it isdesired to remove its shaft 32. In placing the work on the table,

the frame 9 may be rotated to one side as indicated in dotted lines inFig. 2. After the work is in position, the frame 1s rotated back to itsvertical position against stop 1T. The gear is merely placed on thetable with its shaft extending downwardly through the tube 13. In thedrawings the gear is shown in the act of being placed upon the' tableand before it has been lowered down to rest, upon the same. After thusplacing the gear upon the table with the shaft thereof in the middle,the work engaging member 22 is lowered so that the reduced lower portionthereof 34C engages kthe shaft 32. The apparatus is now ready to lowerthe hand lever 2 to the dotted line position in Fig. 2, if necessary,thus exerting a powerful thrust on the shaft and removing the same fromthe gear.

. To place the gear or other member on a shaft or mandrel, use is madeof the adji'lstable foot-bar or frame 35. Said frame is shown as;adjustablyv andpivotally suspended from the base l by means of pins 37extending through each of the uprights ofr said frame and resting on thebase l, The said uprights extend through elongated slots 38 in saidbase, so that they maybe moved to one side or to the center of the base.An adjustable cross-bar IO-connects the legs and serves to support thework when theappai'atus is used to place a pinion on a shaft asindicated in dottedlines in Fig. l. In this case also, an attachment ilhaving an annular base 42 is mountedon the lower end of member 22 toengage the work (seeFig.` 4).v It will be readily apparent therefore,that by bringing the niem- 'ber 4l into engagement with the gear andsupporting the shaft at the lower end by member 4:0, that the gear maybemounted tothe support. The bottom plate l may then remain unsupported,thus making it possiblev to insert or remove mandrels'of differentlengths.

Fig. 5 shows a slight modification in the method of mounting the footvpiece35 which in this case is merely hinged to the base at 4t2. In thisfigure also, an alternative means to pipe 18 for mounting the base 1 andwork holder 12- in lspaced relation is shown, consisting of a. pluralityof rods 50, 5l. Said rods: may be threaded and the plates adjustablyheld thereon by nuts 52, to provide a ready means for altering thedistance between the upper and lower work holders l2 and 40 on bars 35by means of the pins y53 (Figs. 1,2 and 5), and holes 54.

In accordance with the provisions of the patent statutes, I have hereindescribed the principle of operation of my invention, to-V gether withthe apparatus7 which I now consider to represent the best embodimentthe-reof, but I desire to have it understood that the apparatus shown isonly illustrative and vthat the invention can be carried out by othermeans. Also, Vwhile it is designed to use the various features andelements in the combination andrelations described, some of these may bealtered and others emitter wit-hout interfering with the more generalresults outlined, and: the invention extends to such use.

Having herein described my invention what I claim and desire to secureby Letters .'Patentjis,

. l. In a press, abase member, an operating lever pivoted thereon, anupper work holder *mounted in spaced relation to said base, a

loweiwcik holder, meansfor pivotally suspending tlie latter from saidYbase, Vand a work engaging member for operating on the vork whensupported ony either the upper oi' lower holder.

holder, of an operating leverpivotally Vmounted below said holder, aframe pivoted on said lever whereby it may be swung overV or to one sideofthe werkend adjustable means on `the fiame'for engaging the work. 3.In a press, a base member, an operating levervpivoted thereon, lan upperwork holder l' mounted in spaced relationto said basefa lower workholder movably mounted on said base, and a work engaging member foroperating on the work when supported on Aeither the upper or lowerholder. In a press, the combination with a work holder, of an operating'lever pivot'- ally mounted below said holder, a frame pivoted on saidlever whereby it may be swung over or to one side of the work, means onsaid base for limiting the position press comprisingy upper and lowerbases,` spacing means securing saidbasesrin 'spacedrelation, a pair ofhinged members pivoted on the lower base anden. each other, one

of said members being adaptedto be manto Vone side of the.worlnradjiistable lmeans Y on said base for holding said memberverltically above" said work and adjustable Y means onthe Vframe forengaging the work. Y

'8. .In a press, a basemember, an operating' leverpivoted thereon, anup-perrwork holder Vmounted in spaced relationi'to said base, a lowerwork holder movab-ly mounted onsaid base, a work engaging member foroperating on the work .when supported on for securing the upper workholderv to a Sup'- port.

9. In a press, a base member, an operating lever pivoted thereon, anupper work helder mounted in spaced relation' 'to said base, a lowerwork holder mounted' on said base, and a work engaging member foropmeans on Y Y 2. In a press, thecombination with a work ice i vi'iallyoperated, a work engaging punch on veither-'the upperor lower holder andmeans Y erating on the Work when supported on either the upper or lowerholder.

l0. In a press, the combination with a work holder, of an operatinglever pvotally mounted below said holder, a frame pivoted on said leverwhereby it may be swung over or to one side of the work, means on saidbase for limiting the position of said frame and means on the frame forengaging the Work.

In testimony whereof I have aixed my signature.

TOWNSEND W. BURT.

